Panasonic-SAAK370-cs-sm 电路图 维修手册.pdf

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1、I I AMPLIFIER SECTION RMS output power stereo mode THD 10%, both channels driven 1 kHz250 W per channel (6 ) Total RMS stereo mode power500 W PMPO output power5500 W I I FM/AM TUNER, TERMINALS SECTION Preset stationFM 25 stations AM 15 stations Frequency Modulation (FM) Frequency range 87.9 to 107.9

2、 MHz (200 kHz step) (PL Only) 87.5 to 108.0 MHz (100 kHz step) (PL Only) 87.50 to 108.00 MHz (50 kHz step) (GCP Only) Antenna terminal(s)75 (unbalanced) Amplitude Modulation (AM) Frequency range 520 to 1710 kHz (10 kHz step) (PL Only) 522 to 1629 kHz (9 kHz step) (GCP Only) 522 to 1639 kHz (10 kHz s

3、tep) (GCP Only) Aux InputRCA pin jack Music Port (front) jack 2008 Matsushita Electric Industrial Co. Ltd. All rightsreserved.Unauthorizedcopyingand distribution is a violation of law. SA-AK370PL SA-AK370GCP Colour (K). Black Type Sensitivity100 mV, 4.0 k TerminalStereo, 3.5 mm jack Headphone jack T

4、erminalStereo, 3.5 mm jack Output impedance32 (Max) Mic jack Sensitivity0.7 mV, 1.2 k TerminalMono, 3.5 mm jack (1 system) I I CASSETTE DECK SECTION Type1 way Track system4 track, 2 channel Heads Record/playbackSolid permalloy head ErasureDouble gap ferrite head MotorDC servo motor Recording systemA

5、C bias 100 kHz Erase systemAC erase 100 kHz Tape speed4.8 cm/s Overall frequency response (+3, -6 dB) at DECK OUT NORMAL35 Hz to 14 kHz S/N Ratio50 dB (A weighted) Wow and flutter0.18% (WRMS) CD Stereo System Notes: This models CD mechanism changer unit is CRS1. Please refer to the original Service

6、Manual (Order No. MD0509368C0) for this mechanism. Specifications ORDER NO. MD0807004CERadioFans.CN 收音机爱 好者资料库 Fast forward and rewind time Approx. 120 seconds with C-60 cassette tape I I DISC SECTION Disc played 8 cm or 12 cm (1) CD-Audio (CD-DA) (2) CD-R/RW (CD-DA, MP3* formatted disc) (3) MP3* *

7、MPEG-1 Layer 3, MPEG-2 Layer 3 Pick up Wavelength780 nm Beam SourceSemiconductor laser Audio output (Disc) Number of channels2 (FL, FR) I I USB SECTION USB Port USB StandardUSB 2.0 full speed Media file format support MP3 (*.mp3) USB device file system FAT 12 FAT 16 FAT 32 USB port power500 mA (Max)

8、 I I GENERAL 1 Safety Precautions 3 2 Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive (ES) Devices 6 3 Handling Precautions For Traverse Unit 7 4 Precaution of Laser Diode 9 5 About Lead Free Solder (PbF) 10 6 Operation Procedures 11 7 Self diagnosis and special mode sett

9、ing 16 8 Assembling and Disassembling 25 9 Service Fixture and Tools 59 10 Service Positions 59 11 Procedure for Checking Operation of Individual Parts of Deck Mechanism Unit 66 Power supply AC 120 V, 60Hz (PL Only) AC 110 to 127/220 to 240 V, 50/60Hz (GCP Only) Power consumption141 W (PL Only) 124

10、W (GCP Only) Dimensions (WxHxD)250 x 331 x 342 mm Mass5.1 kg Operating temperature range0 to 40C Operating humidity range35 to 80% RH (no condensation) Power consumption in standby mode: 0.3 W (approx.) (PL Only) 0.5 W (approx.) (GCP Only) I I SYSTEM SC-AK370 (PL)Music center: SA-AK370 (PL) Speaker:

11、 SB-AK370 (PL) SC-AK370 (GCP)Music center: SA-AK370 (GCP) Speaker: SB-AK370 (PL) For information on speaker system, please refer to the original Service Manual (Order No. MD0807005CE) for SB-AK370PL-K. Notes: 1. Specifications are subject to change without notice. Mass and dimensions are approximate

12、. 2. Total harmonic distortion is measured by the digital spectrum analyzer. 12 Measurement And Adjustments 67 13 Voltage Measurement and Waveform Chart 69 14 Wiring Connection Diagram 75 15 Block Diagram 77 16 Notes Of Schematic Diagram 85 17 Schematic Diagram 87 18 Printed Circuit Board 101 19 Ill

13、ustration of ICs, Transistors and Diodes 109 20 Terminal Function of Integrated Circuits 110 21 Exploded Views 113 22 Replacement Parts List 117 CONTENTS Page Page 2 SA-AK370PL / SA-AK370GCP RadioFans.CN 收音机爱 好者资料库 1 Safety Precautions 1.1. General Guidelines 1. When servicing, observe the original

14、lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit. 2. After servicing, ensure that all the protective devices such as insulation barriers and insulation papers shields are properly installed. 3. After servicing, check for leakage cu

15、rrent checks to prevent from being exposed to shock hazards. 1.1.1. Leakage Current Cold Check 1. Unplug the AC cord and connect a jumper between the two prongs on the plug. 2. Using an ohmmeter measure the resistance value, between the jumpered AC plug and each exposed metallic cabinet part on the

16、equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the chassis, the reading should be between 1M and 5.2M. When the exposed metal does not have a return path to the chassis, the reading must be. 1.1.2. Leakage Current Hot Check (See Fig

17、ure 1) 1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check. 2. Connect a 1.5k, 10 watts resistor, in parallel with a 0.15F capacitor, between each exposed metallic part on the set and a good earth ground such as a water pipe, as shown in Figure 1. 3. U

18、se an AC voltmeter, with 1000 ohms/volt or more sensitivity, to measure the potential across the resistor. 4. Check each exposed metallic part, and measure the voltage at each point. 5. Reverse the AC plug in the AC outlet and repeat each of the above measurements. 6. The potential at any point shou

19、ld not exceed 0.75 volts RMS. A leakage current tester (Simpson Model 229 or equivalent) may be used to make the hot checks, leakage current must not exceed 1/2 milliamp. Should the measurement is out of the limits specified, there is a possibility of a shock hazard, and the equipment should be repa

20、ired and rechecked before it is returned to the customer. Fig. 1 1.2. Before Use (For GCP Only) Be sure to disconnect the mains cord before adjusting the voltage selector. Use a minus(-) screwdriver to set the voltage selector (on the rear panel) to the voltage setting for the area in which the unit

21、 will be used. (If the power supply in your area is 110V or 127V, set to the “127V” position.) Note that this unit will be seriously damaged if this setting is not made correctly. (There is no voltage selector for some countries, the correct voltage is already set.) 1.3. Before repair and adjustment

22、 Disconnect AC power, discharge AC Capacitors C5700, C5701, C5703, C5704 and C5705 (for PL only) through a 10, 5W resistor to ground. Disconnect AC power, discharge AC Capacitors C5700, C5701, C5703, C5704, C5705, C5706 and C5707 (for GCP only) through a 10, 5W resistor to ground. DO NOT SHORT-CIRCU

23、IT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices. After repairs are completed, restore power gradually using a variac, to avoid overcurrent. Current consumption at AC 120V, 60 Hz in NO SIGNAL mode (volume min at CD mode) should be 750mA. Current consumpti

24、on at AC 110127/220240V, 50/60 Hz in NO SIGNAL mode (volume min at CD mode) should be 750mA. 3 SA-AK370PL / SA-AK370GCP RadioFans.CN 收音机爱 好者资料库 1.4. Protection Circuitry The protection circuitry may have operated if either of the following conditions are noticed: No sound is heard when the power is

25、turned on. Sound stops during a performance. The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are “shorted”, or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used. If

26、this occurs, follow the procedure outlines below: 1. Turn off the power. 2. Determine the cause of the problem and correct it. 3. Turn on the power once again after one minute. Note : When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on

27、again. 1.5. Safety Part Information Safety Parts List: There are special components used in this equipment which are important for safety. These parts are marked byin the Schematic Diagrams & Replacement Parts List. It is essential that these critical parts should be replaced with manufacturers spec

28、ified parts to prevent shock, fire or other hazards. Do not modify the original design without permission of manufacturer. Table 1 Reference No.Part No.Part name & DescriptionRemarks 18RGRX0070S-AREAR PANELM PL 18RGRX0070T-AREAR PANELM GCP 36RKMX0144-KTOP CABINETM 51RMZ0339ZENER COVERM GCP 67REXX068

29、6WHITEWIRE(VOLTAGE SELECTOR) M GCP 68REXX0684BLACK WIREM PL 69REXX0685RED WIREM PL 70REXX0687BLUEWIRE(VOLTAGE SELECTOR) M GCP 78REZX0024RED WIREM GCP 79REZX0023BLACK WIREM GCP 360RAE0165A-VTRAVERSEM (RTL) A2K2CB2CB00021AC CORDM PL A2K2CQ2CA00007AC CORDM GCP PCB1REPX0676DSMPS P.C.B.M (RTL) PL REPX067

30、6ESMPS P.C.B.M (RTL) GCP PCB2REPX0676EVOLTAGE SELECTOR P.C.B.M (RTL) GCP PCB3REPX0676DAC INLET P.C.B.M (RTL) PL REPX0676EAC INLET P.C.B.M (RTL) GCP DZ5701ERZV10V511CSZENERM S5701K0ABCA000007SW VOLTAGE SELECTORM GCP L5702ELF22V035BLINE FILTERM T2900G4D1A0000117SWITCHING TRANSFORMERM T5701ETS48AB116AC

31、MAIN TRANSFORMERM GCP T5701ETS48AB12GACMAIN TRANSFORMERM PL T5751ETS19AB256AGBACKUP TRANSFORMERM PC5701B3PBA0000402PHOTO COUPLERM PC5702B3PBA0000402PHOTO COUPLERM PC5720B3PBA0000402PHOTO COUPLERM PC5799B3PBA0000402PHOTO COUPLERM F1K5D802APA008FUSEM PL F1K5D802BNA005FUSEM GCP FP2901K5G4013A0001FUSE P

32、ROTECTORM TH5701D4CAA5R10001THERMISTORM PL TH5702D4CAC8R00002THERMISTORM GCP TH5860D4CC11040013THERMISTORM P5701K2AA2B000017AC INLETM GCP 4 SA-AK370PL / SA-AK370GCP Reference No.Part No.Part name & DescriptionRemarks P5701K2AB2B000010AC INLETM PL C5700F1BAF10200201000pFM C5701F0CAF334A0870.33uFM C57

33、03F0C2H10400010.1uF 500VM GCP C5703F0CAF224A0850.22uFM PL C5704F1BAF10200201000pFM C5705F1BAF10200201000pFM C5706F1BAF10200201000pFM GCP C5707F1BAF10200201000pFM GCP 5 SA-AK370PL / SA-AK370GCP 2 Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive (ES) Devices Some semiconduct

34、or (solid state) devices can be damaged easily by electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor “chip” components. The following techniques should b

35、e used to help reduce the incidence of component damage caused by electro static discharge (ESD). 1. Immediately before handling any semiconductor component or semiconductor-equiped assembly, drain off any ESD on your body by touching a known earth ground. Alternatively, obtain and wear a commercial

36、ly available discharging ESD wrist strap, which should be removed for potential shock reasons prior to applying power to the unit under test. 2. After removing an electrical assembly equiped with ES devices, place the assembly on a conductive surface such as aluminium foil, to prevent electrostatic

37、charge build up or exposure of the assembly. 3. Use only a grounded-tip soldering iron to solder or unsolder ES devices. 4. Use only an anti-static solder remover device. Some solder removal devices not classified as “anti-static (ESD protected)” can generate electrical charge to damage ES devices.

38、5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices. 6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically

39、 shorted together by conductive foam, aluminium foil or comparable conductive material). 7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed. Caution

40、 Be sure no power is applied to the chassis or circuit, and observe all other safety precautions. 8. Minimize body motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floo

41、r can generate static electricity (ESD) sufficient to damage an ES device). 6 SA-AK370PL / SA-AK370GCP 3 Handling Precautions For Traverse Unit The laser diode in the traverse deck (optical pickup) may break down due to potential difference caused by the static electricity of clothes or our human bo

42、dy. So, be careful of electrostatic breakdown during repair of the traverse deck (optical pickup). Way of handling the traverse deck (optical pickup) 1. Do not subject the traverse deck (optical pickup) to static electricity as it is extremely sensitive to electrical shock. 2. To prevent the breakdo

43、wn of the laser diode, an antistatic shorting pin is inserted into the flexible board (FFC board). 3. Do not to apply excessive stress to the flexible board (FFC board). When removing or connecting the short pin, finish the job in as short time as possible. 4. Do not turn the variable resistor for l

44、aser power adjustment. (It is pre-adjusted during production time) Grounding for electrostatic breakdown prevention 1. Human body grounding Use the anti-static wrist strap to discharge the static electricity from your body. 2. Work table grounding Put a conductive material (sheet) or steel sheet on

45、the area where the traverse deck (optical pickup) is place, and ground the sheet. Caution : The static electricity of your clothes will not be grounded through the wrist strap. So, take care not to let your clothes touch the traverse deck (optical pickup). Caution when replacing the Traverse Deck Th

46、e traverse deck has a short point shorted with solder to protect the laser diode against electrostatics breakdown. Be sure to remove the solder from the short point before making connections. 7 SA-AK370PL / SA-AK370GCP 8 SA-AK370PL / SA-AK370GCP 4 Precaution of Laser Diode CAUTION : This product uti

47、lizes a laser diode with the unit turned on, invisible laser radiation is emitted from the pickup lens. Wavelength: 780 nm Maximum output radiation power from pickup: 100 W/VDE Laser radiation from the pickup unit is safety level, but be sure the followings: 1. Do not disassemble the pickup unit, si

48、nce radiation from exposed laser diode is dangerous. 2. Do not adjust the variable resistor on the pickup unit. It was already adjusted. 3. Do not look at the focus lens using optical instruments. 4. Recommend not to look at pickup lens for a long time. 9 SA-AK370PL / SA-AK370GCP 5 About Lead Free S

49、older (PbF) 5.1. Service caution based on legal restrictions 5.1.1. General description about Lead Free Solder (PbF) The lead free solder has been used in the mounting process of all electrical components on the printed circuit boards used for this equipment in considering the globally environmental conservation. The normal solder is the alloy of tin (Sn) and lead (Pb). On the other hand, the lead free solder is the alloy mainly consists of tin (Sn), silver (Ag) and Copper (Cu), and the melting point of the lead